export function formatFileSize(size: number): string {
  if (size < 1024) return size + ' B'
  if (size < 1024 * 1024) return (size / 1024).toFixed(1) + ' KB'
  if (size < 1024 * 1024 * 1024) return (size / (1024 * 1024)).toFixed(1) + ' MB'
  return (size / (1024 * 1024 * 1024)).toFixed(1) + ' GB'
} 